16018920 has 48 divisors (see below), whose sum is σ = 52062660. Its totient is φ = 4271616.

The previous prime is 16018907. The next prime is 16018927. The reversal of 16018920 is 2981061.

It can be written as a sum of positive squares in 2 ways, for example, as 16016004 + 2916 = 4002^2 + 54^2 .

It is not an unprimeable number, because it can be changed into a prime (16018927) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21889 + ... + 22608.

Almost surely, 2^16018920 is an apocalyptic number.

16018920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16018920 is an abundant number, since it is smaller than the sum of its proper divisors (36043740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16018920 is a wasteful number, since it uses less digits than its factorization.

16018920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44514 (or 44507 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 16018920 is about 4002.3643012599. The cubic root of 16018920 is about 252.0834946307.

Adding to 16018920 its reverse (2981061), we get a palindrome (18999981).

The spelling of 16018920 in words is "sixteen million, eighteen thousand, nine hundred twenty".